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- W2904269507 abstract "We investigate thermal evolution of radio-frequency (RF) spectra of a spin-imbalanced Fermi gas near a Feshbach resonance in which degenerate Fermi-polaron and classical Boltzmann-gas regimes emerge in the low-temperature and high-temperature limits, respectively. By using a self-consistent framework of strong-coupling diagrammatic approaches, both of the ejection and reserve RF spectra available in cold-atom experiments are analyzed. We find a variety of transfers from Fermi polarons to Boltzmann gas such that a thermal crossover expected in the weak-coupling regime is shifted to a sharp transition near unitarity and to double-peak coexistence of attractive and repulsive branches in the strong-coupling regime. Our theory provides semiquantitative descriptions for a recent experiment on the ejection RF spectroscopy at unitarity [Z. Yan {it et al}., arXiv:1811.00481v1] and demonstrate that the RF spectroscopy is an essential probe to examine effects of strong correlations and finite temperature." @default.
- W2904269507 created "2018-12-22" @default.
- W2904269507 creator A5017322345 @default.
- W2904269507 creator A5038648935 @default.
- W2904269507 date "2019-06-12" @default.
- W2904269507 modified "2023-09-30" @default.
- W2904269507 title "Thermal crossover, transition, and coexistence in Fermi polaronic spectroscopies" @default.
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- W2904269507 doi "https://doi.org/10.1103/physreva.99.063606" @default.
- W2904269507 hasPublicationYear "2019" @default.
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